Heating-furnace.



`P'atented Nov. I9, |90I.

T. H. PREST. HEATING FURNCE.

(Application filed Apr. 9, 1897.)

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Patented Nov. I9, |901.

T. H. PnEsT.

HEATING FUBNACE. (Application. died Apr. 9, 1897.)

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UNITED STATES PATENT' OFFICE.

THOMAS H. PREST, OF KANSAS CITY, MISSOURI, ASSIGNOR TO THE PREST HEATINGCOMPANY, OF KANSAS CITY, MISSOURI, A CORPORATION OF MISSOURI.

HEATING- SPECIFICATION forming part of Letters Patent No. 687,062, datedNovember 19, 1901.

Application filed April 9,1897. Serial No. 631.472. (No model.)

To @ZZ whoml it may concern-.-

Be it known that I, THOMAS H. PREST, a citizen of the United States,residing in Kansas City, in the county of Jackson and State of Missouri,have invented certain new and useful Improvements in Heating-Furnaces,

of which the followingis a specification, refand at the same timeaffording au economical and eiiicient heating apparatus.

My invention has for its object also the providing of an apparatus thatmay be readily adapted to varying conditions that may occur in settingup the furnace.

My invention has for its object still further the providing of anapparatus-in which a series of radially-disposed `radiating-pipes ofequal length and capacity are connected at one end with the combustion-chamber land at their other ends are connected with a commondischarge-chamber, which in turn has connected to it the mainsmoke-pipe.

My invention also provides a no vel construction by means of which themain smokepipe may be connected with the dischargechamber in variouspositions.

In my invention are also included certain novel and useful features ofconstruction hereinafter fully described and claimed.

In the accompanying drawings,which illustrate my invention, Figure lrepresents a vertical sectional view of a furnace coustructed inaccordancb with the principles of my invention. Fig. 2 represents atransverse horizontal sectional view taken on a the dotted line Il II ofFig. l and looking in the direction indicated by the arrows which areadjacent to the characters which indicate the said dotted line.. Fig. 3represents a perspective view of the common receiving-chamber having thecap secured to the lower end thereof and the smoke-pipe elbow above thechamber, but disconnected therefrom. In

dinary form and constructed preferably of sheet metal; 2, the canopy orcovering for the casing and from which extend the hot-air pipes 3. Y

4 indicates the front of the furnace, which may be of any suitablematerial or shape. Cast or wrought iron is generally preferred `for thematerial from which to construct the front of the furnace.

5 designates the ashpit,'p'referably of castiron, closed upon all sidesand provided in its front with a rectangular door-opening and in its topplate with a circular opening, by means of which connection isestablished between the fire-pot and the ash-pit. The bottom plate 6 ofthe ash-pit has its under side flush with the lower edge of the front ofthe furnace and also lying in the same horizontal plane as the lowerside of the base-ring 7. The ash-pit bottom near its forward endinclines upwardly toward the bottom yside of the door-opening, so as topermit the easy extraction of the ashes. The rear end o f the ash-pit ispreferably semicircular in form and has secured to it at its lower end aflange 8, which extends from one side of the furnacefront around theash-pit to the other side thereof. The flange 8 inclines upwardly fromthe ash-pit and then outwardly horizontally 9o and has secured to it theinner ends of sev- `eral arms 9, which extend inwardly from the upperend ofthe base-ring 7. Resting upon the top plate of the ash-pit is theannular l fire-pot 10, the opening through which is in line with theopening in the top of the ash-pit. Resting upon the upper edge of the'fire-pot l() is a hollow annular cast ring 1l, the lower side of whichis provided with a vertical annular ange l2, adapted to engage with agroove in the upper edge of the fire-pot to prevent lateral shifting ofthe ring. The upper side of the ring l1 is provided with an annulargroove adapted to receive a vertical IOO annular flange 13 around theperiphery ot au opening in the bottom of the combustionchamber 14.

The general form of the combustion-chamber is that of an upright hollowcylinder provided at its front side with a rectangular feedneck 15,which extends through a rectangular, opening in the furnace-front 4.Around the feed-neck 15 at its forward end is an external iiange 16, towhich is secured the feeddoor frame, comprising a vertical flat plate17, having an opening therethrough corresponding in size and position tothe opening in the feed-neck. Hinged tothe plate 17 upon one side is thefeed-door 13, adapted when closed to close the opening in the feed-neck.

Located upon the top of the combustionchamber at equal distances apartare a series of upwardly-extending inwardly-inclined radiator-pipes 19radially disposed, the lower end of each of which pipes is locatedbetween two concentric vertical flanges 2O and 21, respectively, uponthe upper side of the combustion-chamber and encircling an opening 22therethrough. The upper inner end of each of the pipes 19 is connectedwith a vertical hollow drum or receiving-chamber 23, into which pass theproducts ot' combustion from each of the radiator-pipes 19. The commondischarge or smoke pipe 24 is horizontally disposed and extends throughan opening in the casing l. The inner end of the smoke-pipe 24 iscurved, so as to form a rightangled elbow, the inner end of which isprovided with a horizontal external ange 25 and a vertical groove 2G,adapted to it over either the upper or lower end of thereceiving-chamber 23, which is provided at its upper end with a verticalinternal flange 27, which is concentric with the body of thecombustion-chamber and forms a groove therewith for the reception of theinner one of two concentric flanges 28 and 29, respectively, locatedupon the under side of a horizontal cap-plate 30, adapted to close theupper end of the receiving-chamber. The cap-plate 30 is provided with aseries of vertical openings, through which extend the vertical bolts 31,which have their lower ends secured in vertical openings in the flange25 of the smokepipe. The construction of the parts is such that thesmoke-pipe may be located in the position shown in solid lines in Fig.1, with the inner end secured to the lower end of the receiving-chamberand the cap 30 secured to the upper end thereof, or, if desired, theirrespective positions may be reversed, as indicated by the dotted linesin the same figure.

Encircling the smoke-pipe 24 outside the casing is a collar 32, securedby means of bolts 33, which pass through openings in the casing to acollar 34, which encircles the smoke-pipe 24 inside the casing. Theopenings in the casing which admit the bolts 33 are verticallyelongated, so as to permit vertical movement of the collars. The openingprovided in the casing for the admission of the smoke-pipe is largeenough to permit of vertical movement of the smoke-pipe 24. In furnacesas ordinarily constructed the vertical lifting of the smoke-pipe 24,caused by the warping ofthe castings of the tire-pot or of thecombustion-chamber, either raises the casing from its bearings in thebase ring` or plate, or if the casing is secured rigidly to thebase-plate the opening through which the smoke-pipe passes will beenlarged, permitting hot air to pass from the interior of the casinginto the room occupied by the furnace. To avoid either of these twoobjections, I have provided the smoke-pipe with a vertically-movablebearing in the casing, as described.

Extending vertically through the combustion-chamber are a series ofhot-air ilues 35, which are disposed around in a circle concentric withbut of larger diameter than the ring 11. The function of these hot-airfines is to heat the air passing upward therethrough. Each of the saidilues is fitted at its upper and lower ends in vertical openingsprovided in the top and bottom plates, respectively, of thecombustion-chamber. The lower end of each of the said tlues 35 isprovided with an annular fiange 36, disposed in an oblique planeparallel to the bottom plate of the combustion-chamber upon which itrests. The upper end of each of the said hot-air flues is provided withan external horizontal annular ange 37, the upper side of whichisprovided with two seats which rest in corresponding recesses annular inshape and concentric with the opening in the top Aplate oi' thecombustion-chamber,throngh which the flue extends, and located in theunder side of the said top plate. Around cach {ine-opening in the saidtop plate of the combustion-chamber upon the upper side thereoi` is avertical annular flange 38. A space is provided between the said flange3S and the portion of the flue 35 which is above the top of thecombustionchamber, in which stove putty is placed for the purpose ofsealing the joint against the escape of smoke or gas therethrough.

In setting up the furnace the smoke-pipe 24 may be secured upon the endof the chambei` 23 in any of the positions between the radiator-pipes,as shown in dotted lines between the radiator-pipes 19 in Fig. 2, afterwhich the bolts 31 are inserted through the openings provided thereforin the cap-plate 30 and the flange 25 of the smoke-pipe and securedtherein. The opening in the casing for the admission of the smoke-pipetherethrough should be made in the proper loca-- tion in the casingsuiting the chosen position for the smoke-pipe. B y this constructionone is enabled to pipe directly to the flue in the building from thesmoke-pipe. If the draft of the chimney with which the smoke-pipe is tobe connected is not strong, then the positions of the smoke-pipe and thecap 30 may be reversed from that shown in solid lines in Fig. 1 to theposition indicated by dotted lines IOO IIO

in the same figure, as hereinbefore described. Where the draft is good,it is preferable to use the smoke-pipe in the lower position, as moreeconomy in the use of fuel is thus attained, as well as increasedheating capacity. Vith the radiator-pipes 19 of equal capacity andsymmetrically arranged upon the combustion chamber at equal distancesapart and connected to a common receiving-chamber centrally located, asshown, the products of combustion are equally divided between theseveral radiator-pipes, and each pipe thus has `a heating eect upon vtheincoming air to be heated equal to any of the other radiator-pipes,making a very eflicient heating apparatus, at the same time distributingthe heat equally throughout the furnace and preventing undue destructionby heat of any one part of the fire-pot or combustion-chamber.

My invention is subjective to many modifications without departing fromits spirit.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

l. In a heating-furnace, the combination with a combustion-chamber, of acylindrical receiving-chamber, a plurality of radiatorpipes connectingthe combustion chamber with the receiving-chamber, a cap adapted to besecured to either end of the receivingchamber, a smoke-pipe adapted tobe secured to either end of the receiving-chamber, and means forsecuring the said cap and the said smoke-pipe to the receiving-chamber,substantially as described.

2. In a heating-furnace, the combination with a combustion-chamber, of atubular receiving-chamber, radiator-pipes connecting the combustion andthe receiving chambers, a cap for covering either end of thereceivingchamber, a smoke-pipe covering the opposite end of the saidchamber, and one or more bolts connecting the cap and the smoke-pipe,substantially as described.

3. In a heating-furnace, the combination with a combustion-chamber, of atubular receiving-chamber, radiator pipes connecting the said twochambers, a cap provided with a groove adapted to receive one end of there,- ceiving-chamber, a smoke-pipe provided with a groove adapted toreceive the other end of the receiving-chamber, and means for securingthe said smoke-pipe and the cap interchangeably at either end thereceiving-chamber, substantially as described.

4. In a heating-furnace, the combination with a tubularcombustion-chamber provided in one end with a series of openingsdisposed equidistant from each other and equidistant from the axialcenter of the combustion-chamber, of a tubular receiving-chamber havingthe same axial cen ter as the combustion-chamber, and provided in itsperiphery with a series of openings corresponding in number to theopenings in the end of the combustionchamber, radiator-pipes connectingthe said openings in the two chambers, a cap adapted to be secured ateither end of the receivingchamber and a smoke-pipe adapted to beconnected with the other end of the receivingchamber,V substantially asdescribed.

5. In a heating-furnace, the combination with the vertical tubularreceiving-chamber provided with peripheral openings therethrough andprovided with means for closing either end, of the horizontal smoke-pipehaving its curved inner end adapted to be secured to either end of thereceiving-chamber, substantially as described.

6. In a heating-furnace, the combination with the tubularreceiving-chamber provided with peripheral inlet openings, of a capadapted to be secured to and close either end of the saidreceiving-chamber, a smoke-pipe secured to the open end of thereceiving-chamber, substantially as described.

7. In a heating-furnace, the combination with the tubularreceiving-chamber provided with peripheral inlet-openings, ofl a capprovided with a groove adapted to receive either end of the said tubularchamber, a smokepipe provided with a groove adapted to receive eitherend of the said tubular chamber, and means for 4securing the cap andpipe to the said chamber, substantially as described.

8. In a heating-furnace, the combination with a combustion-chamber, of areceivingchamber, a smoke-pipe, means by which the smoke-pipe may beconnected to the upper or lower end of the receiving-chamber, means forclosing the opposite end thereof, and a radiator-pipe connecting thecombustion-chamber with the receiving-chamber, substantially asdescribed.

9. In a heating-furnace, the combination with a combustion-chamber, of areceivingchamber provided with two discharge-openings, a smoke-pipe,means by which the smokepipe may be connected to either of the two ofsaid openings, means for closing the other of said openings, andradiator-pipes connecting the receiving-chamber with thecombustion-chamber, substantially as described.

10. In a heating-furnace, the combination with a combustion-chamber, ofa receivingchamber, a discharge-pipe, means by which the saiddischarge-pipe may be connected to the upper or the lower end of thereceivingchamber, means for closing the opposite end thereof, and aseries of radially-disposed radiator-pipes located at equal distancesapart and of equal lengths and connected at their lower ends to thecombustion-chamber and inclining upwardly and inwardly therefrom to thereceiving-chamber to the vertical sides of which the radiator-pipes areconnected, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS H. PREST.

Witnesses:

E. E. CHANDLER, WARREN D. HOUSE.

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